Bayern Munich forward Gabriel Vidović will spend the coming season on loan at Mainz, both Bundesliga clubs said on Friday, the final day of the summer transfer window. Vidović’s contract at Bayern has also been extended by one year to June 30, 2026, the club said in a statement, a pre-condition for the loan to go through. According to media reports, the deal includes an option to buy for some €5 million ($5.5 million) after the end of the loan. The Croatia U21 international has been with Bayern since 2016. Vidović “performed very well” during pre-season,” said Bayern’s sporting director Christ…